| 摘要 |
PURPOSE:To enable to reduce the quantity of sealed insulating oil and to suppress the temperature rise of a stator by providing a pressure regulating mamber coupled with a frame in a can, and sealing insulating particles around the stator. CONSTITUTION:When insulating oil B around a stator 2 largely expands due to temperature rise, the expansion of the volume is released through the hole of a case 25 into the case 25, and an elastic material in the case 25 is inwardly compressed. Thus, the pressure difference between the interior and the exterior of the can 3 is almost eliminated. Since insulating particles 33 are sealed around the stator 2, the quantity of the oil B can be reduced. The particles 33 dissipate the heat of a coil end to a frame 1. |
